Sterilizer unit



FIG. 1 is a perspective view of my new sterilizer unit design with the cover for the heating well in the closed position;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a sterilizer unit, substantially as shown and described. 